WIN or lose, Andy Murray plans to party in Scotland the week after the Barclays ATP World Tour finals – his father William is having his stag do there.

The world No1 faces Stan Wawrinka on Friday at the O2 Arena and while victory No22 will equal his longest ever winning streak, he needs only a single set to guarantee a place in tomorrow’s semi-final.

The whole tournament is shaping up for a Sunday showdown with Novak Djokovic for the end-of-year No1 position after the Serb took just 69 minutes to beat stand-in David Goffin 6-1, 6-2 to make it three wins out of three in the round-robin stage.

But whether he is successful or not, Murray has an unusually convivial period planned immediately after the final.

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Andy Murray will be partying in Scotland next week for his dad's stag do

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Andy Murray faces Stan Wawrinka tomorrow

“I’m going to be at home because my dad is getting married two weeks after we finish here so he has got the stag do next weekend,” he said. “I have got that to look forward to. It is up in Scotland.”

Some well earned R&R will be just the ticket for Murray, who has put his body on the line in his bid to climb to the top of the world rankings. But after a miserable 2014, Murray is just happy to be able to play pain free.

“The toughest year for me was the one where I had my back surgery,” he said. “Up until then, I found that really tough, really tiring. I found it stressful.